<template>
  <div class="container">
    <ul>
      <li class="list-item " v-for="(item,index) in list " data-type="0" :key="index">
        <div class="list-box" @touchstart.capture="touchStart" @touchend.capture="touchEnd">
          <img class="list-img" :src="item.imgUrl" alt="">
          <div class="list-content">
            <p class="title">{{item.title}}</p>
            <p class="tips">{{item.tips}}</p>
            <p class="time">{{item.time}}{{startX}}{{endX}}</p>
          </div>
        </div>
        <div class="delete" @click="deleteItem" :data-index="index">删除</div>
      </li>
    </ul>
  </div>
</template>

<script>
  import { Button } from 'vant';
  export default {
    name: 'SliderDelete',
    // props: {
    //   list: {
    //     type: Array,
    //     required: true
    //   }
    // },
    components:{
      [Button.name]:Button
    },
    data () {
    return {
      startX: 0,
      endX: 0,
      list: [{
        title: '111',
        tips: '111',
        time: '20-13'
      }]
    }
  },
    methods:{
      // 滑动开始
      touchStart (e) {
        // 记录初始位置
        this.startX = e.touches[0].clientX
      },
      // 滑动结束
      touchEnd (e) {
        // 当前滑动的父级元素
        let parentElement = e.currentTarget.parentElement
        // 记录结束位置
        this.endX = e.changedTouches[0].clientX
        // 左滑
        if (parentElement.dataset.type == 0 && this.startX - this.endX > 30) {
          this.restSlide()
          parentElement.dataset.type = 1
        }
        // 右滑
        if (parentElement.dataset.type == 1 && this.startX - this.endX < -30) {
          this.restSlide()
          parentElement.dataset.type = 0
        }
        this.startX = 0
        this.endX = 0
      },
      // 判断当前是否有滑块处于滑动状态
      checkSlide () {
        let listItems = document.querySelectorAll('.list-item')
        for (let i = 0; i < listItems.length; i++) {
          if (listItems[i].dataset.type == 1) {
            return true
          }
        }
        return false
      },
      // 复位滑动状态
      restSlide () {
        let listItems = document.querySelectorAll('.list-item')
        // 复位
        for (let i = 0; i < listItems.length; i++) {
          listItems[i].dataset.type = 0
        }
      },
      // 删除
      deleteItem (e) {
        // 当前索引
        let index = e.currentTarget.dataset.index
        // 复位
        this.restSlide()
        // 删除
        this.list.splice(index, 1)
      }
    }
  }
</script>

<style scoped>
  .container{
  padding-bottom: 80px;
}
.page-title{
  text-align: center;
  font-size: 17px;
  padding: 10px 15px;
  position: relative;
}
.page-title:after{
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1px solid #ccc;
  color: #ccc;
  -webkit-transform-origin: 0 100%;
  transform-origin: 0 100%;
  -webkit-transform: scaleY(0.5);
  transform: scaleY(0.5);
  z-index: 2;
}
.list-item{
  position: relative;
  height: 1.6rem;
  -webkit-transition: all 0.2s;
  transition: all 0.2s;
}
.list-item[data-type="0"]{
  transform: translate3d(0,0,0);
}
.list-item[data-type="1"]{
  transform: translate3d(-2rem,0,0);
}
.list-item:after{
  content: " ";
  position: absolute;
  left: 0.2rem;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1px solid #ccc;
  color: #ccc;
  -webkit-transform-origin: 0 100%;
  transform-origin: 0 100%;
  -webkit-transform: scaleY(0.5);
  transform: scaleY(0.5);
  z-index: 2;
}
.list-box{
  padding: 0.2rem;
  background: #fff;
  display: flex;
  align-items: center;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  justify-content: flex-end;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  font-size: 0;
}
.list-item .list-img{
  display: block;
  width: 1rem;
  height: 1rem;
}
.list-item .list-content{
  padding: 0.1rem 0 0.1rem 0.2rem;
  position: relative;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  overflow: hidden;
}
.list-item .title{
  display: block;
  color: #333;
  overflow: hidden;
  font-size: 15px;
  font-weight: bold;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-item .tips{
  display: block;
  overflow: hidden;
  font-size: 12px;
  color: #999;
  line-height: 20px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-item .time{
  display: block;
  font-size: 12px;
  position: absolute;
  right: 0;
  top: 0.1rem;
  color: #666;
}
.list-item .delete{
  width: 2rem;
  height: 1.6rem;
  background: #ff4949;
  font-size: 17px;
  color: #fff;
  text-align: center;
  line-height: 1.6rem;
  position: absolute;
  top:0;
  right: -2rem;
}
</style>